Manganous manganate and permanganate depolarizing agent.



' GARLETON ELLIS, 0F MONTCLAIR, NEW JERSEY, ASSIGNOJR', BY MESNE ASSIGNMENTS,

. TO NATIONAL CARBON COMPANY,

TION OF NEW JERSEY.

0]? LONG ISLAND QITY, NEW YORK, A CORPORA- MANGANOUS MANGANATE AND PERMANGANATE DEPOLARIZING AGENT.

No Drawing.

To all whom it may concern:

Be it known that I, CABLETON ELLIS, a citizen of the United States, and a resident of Montclair, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Manganous Manganate and Permanganate Depolarizing Agents, of which the following is a speci-v fication.

This invention relates to manganese depolarizing material adapted for batteries of the Leclanch type and relates in particular to the manganese salts of manganic and permanganic acid, including the normal, basic and acid types and to a desirable physical form thereof.

For example by. reacting on a manganate with a manganous salt and according to the proportions used, basic, acid and normal manganous manganates are formed, the normal manganous manganate having the composition MnO'MnO the basic manganous manganate being represented by (M110)? M110 and the acid mangirt lous manganate' having the formula 0' (MnO,),, or M110 H 0 (Mn0 or H,Mn(MnO,),. Similarl manganous permanganate in its several orms may be used such as the normal manganous permanganate (M110); Mn O.,, the basic manganous permanganate (Mn Mn,,0 and the acid ermarfignate Mno-mo-M o, or H, n ,o r Other bases may replace the manganous manganese in whole or in part.

lhese compounds lose-their oxygen very readily when heated to a comparatively low temperature and are far more active than a depolarizer such as ground pyrolusite which does not give up its oxygen very freely.

Such bodies in the finely-divided state either separately or in admixture maybe incorporated with graphite to form a depolarizing mass which may be molded under pressure to any desired shape for use in dry batteries with an ammonium chlorid exciting fluid prepared in the usual way employing carbon and zinc electrodes.

Much efiort has been made to secure a very highly active form of manganese dioxid of suitable character and the present Specification of Letters Iatent.

, Application filed October 25 Patented July in, rain.

, 1915. Serial No. 57,644.

the barium chlorid is replaced by the manganese of the manganous chlorid and barium chlorid is formed, leaving an insoluble manganous permanganate.

By substituting potassium manganate, for

potassium permanganate Ithe barium man-.

ganate will be formed and from this insoluble manganous manganate can be formed by digesting with manganous chlorid.

Acid, normal, or basic compounds may be formed by varying the agent and those given above will give the normal compound;

Aside from having the necessary component of oxygen, the physical form of the depolarizing material is an important consideration. In the present case, flaky products may be obtained which when employed with flaky graphite enable the formation of a lamellar depolarizing mass through which a very satisfactory penetration of the electrolyte is secured and the conductivity of such a laminated mass is relatively high. The flaky material maybe formed by passing the above product in a wet state through heated heavy rolls, dried and left in a flaky condition.

What I claim is 1. A manganous compound of a highly oxygenated acid of manganese adapted for use as a depolarizing agent in dry batteries.

2. A manganous compound of a highly oxygenated acid of manganese of a flaky character, adapted for use as a depolarizing agent in dry batteries.

3. A manganous compound of a highly 10c hydroxid, potas- 55 5 parts potassium mto proportion of rere whereby the material is ac oxygenated acid of manganese comprising 6. As a depolarizing agent neutral manmanganous manganate adapted for use as a ganous manganate.

depolarizing agent in dry batteries. 7. As a depolarizing agent an insoluble manganous compound of a highly manganate.

5 oxygenated acid of manganese adapted as a 8. As a depolarizing agent an insoluble depolarizing agent for dry batteries. manganate of flaky nature.

5. As a depolarizing agent manganous manganate. CARLETON ELLIS. 

